PCF8563BS/4 View Datasheet(PDF) - NXP Semiconductors.
Part Name
Description
MFG CO.
'PCF8563BS/4' PDF : 45 Pages View PDF
NXP Semiconductors
PCF8563
Real-time clock/calendar
13. Dynamic characteristics
Table 30. Dynamic characteristics
VDD = 1.8 V to 5.5 V; VSS = 0 V; Tamb = 40 C to +85 C; fosc = 32.768 kHz; quartz Rs = 40 k; CL = 8 pF; unless otherwise
specified.
Symbol
Parameter
Conditions
Min
Typ
Max Unit
Oscillator
COSCO
fosc/fosc
capacitance on pin OSCO
relative oscillator frequency variation
Quartz crystal parameters (f = 32.768 kHz)
VDD = 200 mV;
Tamb = 25 C
15
25
35
pF
-
0.2
-
ppm
Rs
CL
Ctrim
series resistance
load capacitance
trimmer capacitance
parallel
external;
on pin OSCI
-
-
[1] 7
-
5
-
100
k
12.5 pF
25
pF
CLKOUT output
CLKOUT
duty cycle on pin CLKOUT
I2C-bus timing characteristics (see Figure 28)[3][4]
[2] -
50
-
%
fSCL
tHD;STA
tSU;STA
tLOW
tHIGH
tr
SCL clock frequency
[5] -
-
hold time (repeated) START condition
0.6
-
set-up time for a repeated START condition
0.6
-
LOW period of the SCL clock
1.3
-
HIGH period of the SCL clock
0.6
-
rise time of both SDA and SCL signals
standard-mode
-
-
400
kHz
-
s
-
s
-
s
-
s
1
s
fast-mode
-
-
0.3
s
tf
Cb
tSU;DAT
tHD;DAT
tSU;STO
tw(spike)
fall time of both SDA and SCL signals
capacitive load for each bus line
data set-up time
data hold time
set-up time for STOP condition
spike pulse width
on bus
-
-
-
-
100
-
0
-
0.6
-
-
-
0.3
s
400
pF
-
ns
-
ns
-
s
50
ns
[1]
CL is a calculation of Ctrim and COSCO in series:
CL
=
----C----t--r--i--m-------C-----O---S---C----O-----
Ctrim + COSCO
.
[2] Unspecified for fCLKOUT = 32.768 kHz.
[3] All timing values are valid within the operating supply voltage at ambient temperature and referenced to VIL and VIH with an input voltage
swing of VSS to VDD.
[4] A detailed description of the I2C-bus specification is given in Ref. 11 “UM10204”.
[5] I2C-bus access time between two STARTs or between a START and a STOP condition to this device must be less than one second.
PCF8563
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 9 — 16 June 2011
© NXP B.V. 2011. All rights reserved.
31 of 45
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